My exercise of choice here is floor-slide mountain climbers. You will need some furniture moving pads, Valslides, or something similar that will slide smoothly on your floor. Paper plates even work well in a pinch. Put your feet on the sliders and move into a push-up position. To perform the movement, simply pull one knee at a time up toward your chest, going as high as you can while keeping your foot on the slider. You can alternate legs with each rep or do sets of one leg at a time. Don't expect it to be easy.

The hip flexors are a group of five muscles that connect the femur (or thigh bone) to the pelvis. They move in one of two ways. When the pelvis is stationary, a contraction of the hip flexors will draw the femur upward—think the classic "goose step." Conversely, if the femur is stationary, a contraction of the hip flexors will tilt the pelvis forward and the butt back—think of the pull-back portion of Garth's many hip thrusts beginning at about 40 seconds in ... foxy lady!
For runners, tight hip flexors prevent full rear extension of the leg. To compensate, stiff runners achieve extension by arching their back and tilting their pelvis forward; this shifts the foot strike forward, in front of the runner’s center of mass, and creates an inefficient braking force, as well as a heavy foot strike that takes its toll on ankle, hip, and knee joints, explains USA Triathlon performance adviser Bobby McGee.
Really great content. I also had some lower back problem but now that I know the source, I will work on it. My counsins also talked to me about this product called Panifix, or "Unlock your hip flexor" which Gives You A Practical, Easy-to-follow Program You Can Use To Instantly Release Your Hip Flexors For More Strength, Better Health And All Day Energy. Proven Swipes And Creatives Here:https://tinyurl.com/yd6nbzfh
Sit on the ground with your legs straight out in front of you. Bend both knees to bring your feet together, heel to heel and toes to toes. Using your hands, “open” your feet like you are opening a book. This will cause the knees to lower toward the floor. You can also use your arms to put gentle pressure on your knees to push them toward the floor and intensify the stretch. Keep your back straight and don’t huch forward. Breath deeply.

I think you should mention that for some people, stretching is not the solution and that it will deteriorate their posture. Some people need stretching, but most people I know need to strengthen their "overstretched" hip flexors. Many people can't do a single hanging leg raise. Check this site if you want to know more about the importance of hip flexors ********** www.smarterpage.wixsite.com/unlock-

It’s a common issue, says Prevention advisor Rob Danoff, director of family and emergency medicine residency programs at Aria Health in Philadelphia. "For people who sit a long time at work, the hip flexors and rotators become tight, and the gluteal muscles become weak," he says. "This combination negatively affects our ability to walk, maintain proper posture, and the stability of our spine."
For example, your quadriceps muscles are a group of four that are located at the front of the thigh; one of the group members, the rectus femoris flexes the hip, which brings your lower extremity (thigh, lower leg, and foot) forward, in front of you. On the other hand, your hamstring muscles are located at the back of the thigh. When they contract, they extend the lower extremity, bringing it behind you.
Muscle Imbalances – The front of your hips, your hip flexors, are the muscles that will tighten and shorten while you are sitting for hours each day. While you are sitting, the back of your hips, your glutes and your hip extensors, are being overstretched. But just because they are being tightened and stretched respectively, doesn’t benefit either of them. They are also being weakened because of the lack of use of each muscle group.
The good news is that there are plenty of good hip stretches out there that you can do to relieve discomfort, decrease tightness, and increase mobility in your hips. Since your hips are involved in so many of the movements you make (both inside and outside of the gym) stretching them is a great way to keep them feeling good and ready to work for you. Add some of the 12 hip stretches Atkins demos below to the end of your workout, or spend 10 minutes each day just doing a few of them, to improve mobility in your hips.